Pitman connection.



PATENTED JULY 18, 1905.

E. E. ELLIS. PITMAN CONNECTION.

APPLIoATIo-N FILED FEB. 18,1905.

IINTTED STATES Patented July 18, 1905.

PATENT EETCE.

GEORGE H. ELLIS, OF CHICAGO, ILLINOIS, ASSIGNOR TO INTERNATIONAL HARVESTER COMPANY, A CORPORATION OE 'NEW JERSEY.

PITNIAN CONNECTION.'

SPECIFICATIGN forming part of Letters Patent N o. 794,793, dated July 18, 1905.

Application filed February 18,1905. Serial N0, 246,210.

To all whom, t may concern,.-

Be it known that I, GEORGE I-I. ELLIS, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Pitman Connections, of which the following isa specification, reference being had to the accompanying drawings, forming a part thereof.

My invention relates to pitman connections, and is particularly applicable to the pump connections of oil or gas engines wherein the iuid is regularly forced from the source of supply to the carbureting mechanism by means of a force-pump operatively connected with a moving part ofthe engine.

In engines of the above class it is the usual practice to have the pump connections so are ranged that the pump may be operated indeplendent of the engine in order to supply sufcient explosive mixture to start the engine; and the object of my invention is to provide means that may be readily operated independently of the engine without affecting its normal operation; and it consists in providing a two-part pivotally-connected pitman connection between a moving part of the engine and the pump rod or plunger.

In the drawings, Figure 1 represents a side elevation of a portion of an engine sufficient to illustrate the application of my invention. Fig. 2 is a detail view of the pitman connection. Fig. 3 is a view showing the independent operation of the device. Fig. 4 is a side elevation, partly in section, of Fig. 2.

The same reference -numerals denote like parts.

5 is the engine-base; 6, the fly-wheel 7, the crank-shaft,- 8, the cylinder; 9, the valve-rod 1 O, the pump 1 1, the pipe connection from the pump to the supply-tank; 12, the pipe connection from the pump to the mixing-chainber, 1 3, the valve-operating gear-wheel driven by the gear 14, secured to the engineshaft.

is a crank-wheel secured to the shaft A supporting the gear-wheel 13 and provided with a crank-pin 16.

17 is the plunger-rod of the pump and, 18 is a pitman connection between the plunger and the crank-pin 16.

The pitman comprises two parts 19 and 20, pivotally connected at 21 a short distance above the pivotal connection between the lower end of the pitman and the plunger 17. The upper portion of the pitman part 19 is provided with a slotted opening 22, adapted to receive the inner end of a spring-actuated plunger-bolt 23, carried in a cyinder-like portion 24 at the upper end of the pitman part 20. The lunger-bolt 23is providedwith a head 25 an a body portion 26, surrounded by a coil-spring 27, operative between the shoulder 28 on the bolt and the inner surface of the end of the cylinder, to project the inner end of the plunger-bolt into the slot in the pitman part 19, as shown in Fig. 4.

When the plunger-bolt is in engagement with the slot, the two parts ofthe pitman operate as one piece during the regular operation ofthe engine. When it is desired to operate the pump by hand independent of the engine, the lunger-bolt is pulled out of the slotted opening in the part 19, and the part 20 may then be used in the same mamier as an ordinary pump-handle, its fulcrum being the joint-pin at 21, as shown in Fig. 3, by means of which the pump may be operated.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. A pitman connection between a driving and driven member comprising two overlap ping members normally operating as one member, one end of the overlapping portion adapted to 'form a fulcrum upon which one part of the pitman may be moved in a manner to operate the driven member.

2. In a pitman connection between a driving and driven member, a pitman comprising two members pivotally connected one with the other and normally operating as one 3. A pitman comprising two parts that are` pivotallyT connected, a spring-bolt carried by one oi the parts and adapted to engage with the other part in a manner to hold the two parts normally operative.

4. A pitman comprising two parts that are pivotally connected, a cylindrical head formed upon one oi' the parts, a spring-actuated dotent adapted to slide in the cylindrical head in a manner to be engaged with or disengaged from the other part of the pitman.

5. In a pitman connection between a driving and driven member, the combination oi' a two-part pitman having one end of each part pivotally connected with the driving and driven members, respectively, to normally operate as one part, and having the opposite end of one of the parts pivotally connected with the other in a manner to Jform a fulcrum about which one part may be moved as a lever to operate the said driven member.

6. In a pitman connection between a driving and a driven member, the combination of a two-part pitman having one end oi' each part pivotally connected with the driving and driven members, respectively, to normally operate as one part and having the opposite end of one of the parts pivotally connected with the other in a manner to form a fulcrum about which one part may be moved as a lever to operate the said driven member and means for releasably retaining the two parts in the normal operative position.

In witness whereor` I hereto aHiX my signature in presence of two witnesses.

GEORGE H. ELLIS.

Witnesses:

MARGARET A. SWEENEY, J. C. WARNES. 

